Sponge product



FIG. 1 is a perspective view of a sponge product showing the new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a first end view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a second end view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a sponge product, as shown. 